C++ SXMPMeta::AppendArrayItem方法代码示例

bool xmp_append_array_item(XmpPtr xmp, const char *schema, const char *name,
			   uint32_t arrayOptions, const char *value,
			   uint32_t optionBits)
{
	CHECK_PTR(xmp, false);
	RESET_ERROR;

	bool ret = false;
	SXMPMeta *txmp = (SXMPMeta *)xmp;
	try {
		txmp->AppendArrayItem(schema, name, arrayOptions, value,
				      optionBits);
		ret = true;
	}
	catch(const XMP_Error & e) {
		set_error(e);
	}
	catch(...) {
	}
	return ret;
}

    int XmpParser::encode(      std::string& xmpPacket,
                          const XmpData&     xmpData,
                                uint16_t     formatFlags,
                                uint32_t     padding)
    { try {
        if (xmpData.empty()) {
            xmpPacket.clear();
            return 0;
        }

        if (!initialize()) {
#ifndef SUPPRESS_WARNINGS
            std::cerr << "XMP Toolkit initialization failed.\n";
#endif
            return 2;
        }

        SXMPMeta meta;
        for (XmpData::const_iterator i = xmpData.begin(); i != xmpData.end(); ++i) {
            const std::string ns = XmpProperties::ns(i->groupName());
            XMP_OptionBits options = 0;

            if (i->typeId() == langAlt) {
                // Encode Lang Alt property
                const LangAltValue* la = dynamic_cast<const LangAltValue*>(&i->value());
                if (la == 0) throw Error(43, i->key());
                int idx = 1;
                // write the default first
                LangAltValue::ValueType::const_iterator k = la->value_.find("x-default");
                if (k != la->value_.end()) {
#ifdef DEBUG
                    printNode(ns, i->tagName(), k->second, 0);
#endif
                    meta.AppendArrayItem(ns.c_str(), i->tagName().c_str(), kXMP_PropArrayIsAlternate, k->second.c_str());
                    const std::string item = i->tagName() + "[" + toString(idx++) + "]";
                    meta.SetQualifier(ns.c_str(), item.c_str(), kXMP_NS_XML, "lang", k->first.c_str());
                }
                for (k = la->value_.begin(); k != la->value_.end(); ++k) {
                    if (k->first == "x-default") continue;
#ifdef DEBUG
                    printNode(ns, i->tagName(), k->second, 0);
#endif
                    meta.AppendArrayItem(ns.c_str(), i->tagName().c_str(), kXMP_PropArrayIsAlternate, k->second.c_str());
                    const std::string item = i->tagName() + "[" + toString(idx++) + "]";
                    meta.SetQualifier(ns.c_str(), item.c_str(), kXMP_NS_XML, "lang", k->first.c_str());
                }
                continue;
            }
            // Todo: Xmpdatum should have an XmpValue, not a Value
            const XmpValue* val = dynamic_cast<const XmpValue*>(&i->value());
            assert(val);
            options =   xmpArrayOptionBits(val->xmpArrayType())
                      | xmpArrayOptionBits(val->xmpStruct());
            if (   i->typeId() == xmpBag
                || i->typeId() == xmpSeq
                || i->typeId() == xmpAlt) {
#ifdef DEBUG
                printNode(ns, i->tagName(), "", options);
#endif
                meta.SetProperty(ns.c_str(), i->tagName().c_str(), 0, options);
                for (int idx = 0; idx < i->count(); ++idx) {
                    const std::string item = i->tagName() + "[" + toString(idx + 1) + "]";
#ifdef DEBUG
                    printNode(ns, item, i->toString(idx), 0);
#endif
                    meta.SetProperty(ns.c_str(), item.c_str(), i->toString(idx).c_str());
                }
                continue;
            }
            if (i->typeId() == xmpText) {
                if (i->count() == 0) {
#ifdef DEBUG
                    printNode(ns, i->tagName(), "", options);
#endif
                    meta.SetProperty(ns.c_str(), i->tagName().c_str(), 0, options);
                }
                else {
#ifdef DEBUG
                    printNode(ns, i->tagName(), i->toString(0), options);
#endif
                    meta.SetProperty(ns.c_str(), i->tagName().c_str(), i->toString(0).c_str(), options);
                }
                continue;
            }
            // Don't let any Xmpdatum go by unnoticed
            throw Error(38, i->tagName(), TypeInfo::typeName(i->typeId()));
        }
        std::string tmpPacket;
        meta.SerializeToBuffer(&tmpPacket, xmpFormatOptionBits(static_cast<XmpFormatFlags>(formatFlags)), padding); // throws
        xmpPacket = tmpPacket;

        return 0;
    }
    catch (const XMP_Error& e) {
#ifndef SUPPRESS_WARNINGS
        std::cerr << Error(40, e.GetID(), e.GetErrMsg()) << "\n";
#endif
        return 3;
    }} // XmpParser::decode

/**
* Initializes the toolkit and attempts to open a file for updating its metadata. Initially
* an attempt to open the file is done with a handler, if this fails then the file is opened with
* packet scanning. Once the file is open several properties are read and displayed in the console.
*
* Several properties are then modified, first by checking for their existence and then, if they 
* exist, by updating their values. The updated properties are then displayed again in the console. 
*
* Next a new XMP object is created from an RDF stream, the properties from the new XMP object are
* appended to the original XMP object and the updated properties are displayed in the console for
* last time.
*
* The updated XMP object is then serialized in different formats and written to text files.  Lastly,
* the modified XMP is written back to the resource file.
*/
int main ( int argc, const char * argv[] )
{
	if ( argc != 2 ) // 2 := command and 1 parameter
	{
		cout << "usage: ModifyingXMP (filename)" << endl;
		return 0;
	}

	string filename = string( argv[1] );

	if(!SXMPMeta::Initialize())
	{
		cout << "Could not initialize toolkit!";
		return -1;
	}
	
	XMP_OptionBits options = 0;
	#if UNIX_ENV
		options |= kXMPFiles_ServerMode;
	#endif
		
	// Must initialize SXMPFiles before we use it
	if(SXMPFiles::Initialize(options))
	{
		try
		{
			// Options to open the file with - open for editing and use a smart handler
			XMP_OptionBits opts = kXMPFiles_OpenForUpdate | kXMPFiles_OpenUseSmartHandler;

			bool ok;
			SXMPFiles myFile;
			std::string status = "";

			// First we try and open the file
			ok = myFile.OpenFile(filename, kXMP_UnknownFile, opts);
			if( ! ok )
			{
				status += "No smart handler available for " + filename + "\n";
				status += "Trying packet scanning.\n";

				// Now try using packet scanning
				opts = kXMPFiles_OpenForUpdate | kXMPFiles_OpenUsePacketScanning;
				ok = myFile.OpenFile(filename, kXMP_UnknownFile, opts);
			}

			// If the file is open then read get the XMP data
			if(ok)
			{
				cout << status << endl;
				cout << filename << " is opened successfully" << endl;
				// Create the XMP object and get the XMP data
				SXMPMeta meta;
				myFile.GetXMP(&meta);

				// Display some properties in the console
				displayPropertyValues(&meta);
				
				///////////////////////////////////////////////////
				// Now modify the XMP
				if(meta.DoesPropertyExist(kXMP_NS_XMP, "CreatorTool"))
				{
					// Update xap:CreatorTool - we don't need to set any option bits
					meta.SetProperty(kXMP_NS_XMP, "CreatorTool", "Updated By XMP SDK", 0);
				}

				// Update the Metadata Date
				XMP_DateTime updatedTime;
				// Get the current time.  This is a UTC time automatically 
				// adjusted for the local time
				SXMPUtils::CurrentDateTime(&updatedTime);
				if(meta.DoesPropertyExist(kXMP_NS_XMP, "MetadataDate"))
				{
					meta.SetProperty_Date(kXMP_NS_XMP, "MetadataDate", updatedTime, 0);
				}
				
				// Add an item onto the dc:creator array
				// Note the options used, kXMP_PropArrayIsOrdered, if the array does not exist it will be created
				meta.AppendArrayItem(kXMP_NS_DC, "creator", kXMP_PropArrayIsOrdered, "Author Name", 0);
				meta.AppendArrayItem(kXMP_NS_DC, "creator", kXMP_PropArrayIsOrdered, "Another Author Name", 0);

				// Now update alt-text properties
				meta.SetLocalizedText(kXMP_NS_DC, "title", "en", "en-US", "An English title");
				meta.SetLocalizedText(kXMP_NS_DC, "title", "fr", "fr-FR", "Un titre Francais");
				
				// Display the properties again to show changes
//.........这里部分代码省略.........